Approximate frequency beam command of the RPFSR system in the ground based coordinate system

Abstract

The phase and frequency commands of a rotating radar system, that utilizes the frequency scanning and phase shifters to steer the beam in the azimuth and elevation directions, respectively, are derived in terms of the angles of the ground based coordinate system. The frequency equation derived is approximated to a simple form to reduce the calculation time for real time multi-function radar systems. It is shown that the approximate Frequency commands are in good agreement with the exact ones if the range of the azimuth scanning is not too wide.